Plug-cock.



'Patented June s, 1909.

Wmllllllmlll llm m.

l. 4 u mi, r

WITNESSES BVM r ATTO/MIE YS yNITED sTATEs PATENT OFFICE.

JOHN GIBB PATERSON, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OF ONE-HALF TOBENJAMIN F. HULSE, OF LOS ANGELES, CALIFORNIA.

PLUG-cock.

Specification of Letters Patent.

Patented .Tune 8, 1909.

Application filed December 24, 1908. Serial No. 469,064.

To all whomit may concern: Y i

Be it known that I, JOHN GIBB PATERsoN, a citizen of the United States,and a resident of Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented a new and Improved Plug-Cock, of which thefollowing is a full, clear, and exact description. The invention is animprovement in plug cocks, and has in view means to withdraw the plugfrom its seat in opening the cock, thus avoiding friction and consequentcutting and abrasion of the plug and its seat. When the cock is closed,the plug is forced 4to its seat tighter than would otherwise bepractical in the conventional plug cock. l

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in both views.

Figure 1 is a central longitudinal section of a plug cock embodying myinvention and showing the plug closed; and Fig. 2 is a similar sectionalview showing the cock open.

In the construction of my improved plug cock, a. casing 5 of the usualform is einployed, which is shown to have a passage 6 therethroughandinternally threaded at each end for pipe connections, also having aconical seat intersecting the passage for receiving the conical ortapering end of a plug 7, the lower end of the latterpassing into theusual socket`8 of the casing, and at a point thereabove provided withthe customary transverse opening 9, which is movable into register or'alinement with the passage 6 of the casing when the cock is opened. Theupper oi' outer portion of the plug 7 passes 4through a stuffing-box 10,Where it is of uniform cross-section and movable in a packing gland 11,the latter being threaded within thestuffing-box and forming a.fluid-tight connection around the plug by means of the packing 12. Theplug at it-sl outer end has the usual wrench-engaging or handle p01'-tion 13, and an adjacent reduced' port-ion forming a shoulder 14, onwhich seats a cap 15 closely fitting the reduced ortion ofthe -plug andhaving an enlarge portion 16,

ithreaded over the stuHing-box 10 of tli'e plug has a series of recesses1T. in one of which engages a screw 18, threaded through the reducedportion or neck of the cap and connecting the plug and cap together. 0nthe outer portion of the plug a nut 19 is threaded and seats on theouter end of the cap, binding the saine to the shoulder 1-l. Therecesses 17 in the plug are preferably elongated in order that the screwmay freely pass therein when the position of the screw is slightlyelevated or depressed. The particular connection between the cap andplug. obviously enables lthem t0 be so 'adjusted relatively that theplug will be forced tight to its seat when the opening 9 therein isturned at right-angles to the passage 6. In opening the cock` the capunthreads from the cock casing and withdraws the plug from its seat.thus avoiding friction between these parts and thecutting of the metalincident thereto. ln closing the cock` thc plug can be forced to itsseat tighter than would be practical if the plug remained seated in bothofits, positions. as in ihc customauv plug cock construction. c

Having thus described in v invention. l claim as new and desire tosecure by Letters Patent:

1. A plug cock having means for withdrawing tlie plug `from its seat inopening the cock. and means for adjusting said means circuinferentiallyon the. plug.

2. 'llie combination of a cock casinghaving a passage therethrough, aplug having a conical portion seating in the casing and intersect-ingsaid passage and provided with an opening` a stutiing-box surroundingthe nected with the plug and 'threaded over the shitting-box, towithdraw the plug from its seat in turning the opening therein intoalineinent with the passage in the casing.

In testimony whereof I have signed my naine to this specification in thepresence of two subscribing witnesses.

JOHN GIBB PATERSON.

Witnesses:

ANDREW SCHoLz,

W. 1". M GARTHUR.

casing. The reduced portion of the plug.

body of the plug. and a cap adjustably con-

